diff --git a/AGENTS.md b/AGENTS.md
index 34f81b8..33b61f6 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -93,6 +93,17 @@ cargo clippy --all-targets -- -D warnings
 cargo fmt --check
 ```
 
+Doc gates (task `release-crate-docs`, 2026-10-11):
+
+```
+RUSTDOCFLAGS="-D warnings" cargo doc --no-deps   # zero rustdoc warnings (broken/redundant/private-intra-doc links)
+```
+
+The four published crates (`alkstore`, `alkstore-sqlite`,
+`alkstore-postgres`, `alkstore-mem`) carry `#![warn(missing_docs)]` in
+their roots — enforced through the clippy `-D warnings` gate above
+(rustc lints promote to errors there).
+
 Fuzzing is adopted (2026-10-10 — wave 7; `docs/research/fuzzing.md`),
 modeled on the alkcall/alktunnels/alksocks/alktty pattern: the `fuzz/`
 sidecar workspace pins nightly inside `fuzz/` only, the stable
diff --git a/alkstore-contract-suite/src/properties.rs b/alkstore-contract-suite/src/properties.rs
index 8eba8c9..2036d2d 100644
--- a/alkstore-contract-suite/src/properties.rs
+++ b/alkstore-contract-suite/src/properties.rs
@@ -87,7 +87,7 @@ fn expect_ok<T>(label: &str, out: alkstore::Result<T>) {
 /// **Exemplar row** — name validation at every entry point,
 /// auto-commit and tx paths alike.
 ///
-/// Every name-bearing entry point on the [`Store`](alkstore::Store)
+/// Every name-bearing entry point on the [`Store`]
 /// surface — and every name-bearing `*_tx` twin on the
 /// [`TxHandle`](alkstore::TxHandle) — rejects, before any engine round
 /// trip: the empty (or whitespace-only) name with
@@ -1143,7 +1143,7 @@ async fn await_claimable(
 /// equivalence pin (ADR-012 §2: engine-side arithmetic, suite-pinned
 /// identical outputs). The row drives claim → `retry(err, None)`
 /// cycles on a queue with `backoff_base_s = 2` (integer-second
-/// resolution: the ranges [1,2], [2,4], [4,8] land across the first
+/// resolution: the ranges \[1,2\], \[2,4\], \[4,8\] land across the first
 /// three attempts), reading each computed delay back through
 /// `get_job`'s resolved `run_at` minus a clock read taken before the
 /// retry, asserting range membership per attempt — with a
diff --git a/alkstore-mem/src/lib.rs b/alkstore-mem/src/lib.rs
index 93d5ab9..1c16d91 100644
--- a/alkstore-mem/src/lib.rs
+++ b/alkstore-mem/src/lib.rs
@@ -29,13 +29,46 @@
 //! # Architecture
 //!
 //! The store instance *is* the state: guarded per-mechanism sections
-//! (`crate::state`) behind short-held synchronous internal locks,
+//! behind short-held synchronous internal locks,
 //! tokio primitives for cross-await coordination. The tx seam is an
-//! overlay ([`crate::tx`] — stage in the handle-private overlay, commit
+//! overlay (`tx` — stage in the handle-private overlay, commit
 //! merges atomically + wakes at commit, drop discards); wakes route
-//! through in-process channels (`crate::wakes`) — delivered at the
+//! through in-process channels (`wakes`) — delivered at the
 //! commit boundary directly to each open receiver, per-subscriber FIFO
 //! by commit order, never coalesced (no batching boundary exists).
+//!
+//! # Example
+//!
+//! The honest-ephemeral engine is the zero-config one, so this crate
+//! carries the contract round-trip example: open with one call,
+//! enqueue a job, claim it back (the other engines construct through
+//! their `open` form with a connection target and opts — the surface
+//! round-trip below is identical there).
+//!
+//! ```
+//! use alkstore::{EnqueueOpts, JobHandle, QueueOpts, Store};
+//! use alkstore_mem::MemStore;
+//!
+//! # fn main() -> Result<(), Box<dyn std::error::Error>> {
+//! let rt = tokio::runtime::Builder::new_current_thread().build()?;
+//! let store = MemStore::new();
+//! let queue = rt.block_on(store.queue("demo", QueueOpts::default()))?;
+//! let job_id = rt.block_on(queue.enqueue(
+//!     serde_json::json!("hello"),
+//!     EnqueueOpts::default(),
+//! ))?;
+//! let claimed = rt.block_on(queue.claim_one("worker-1"))?
+//!     .expect("the enqueued job is claimable");
+//! assert_eq!(claimed.job().id, job_id);
+//! assert_eq!(claimed.job().state, alkstore::JobState::Processing);
+//! # Ok(())
+//! # }
+//! ```
+//!
+//! Every public item carries doc text; the missing-docs lint is part
+//! of the standing gates.
+
+#![warn(missing_docs)]
 
 mod clock;
 mod lock;
diff --git a/alkstore-postgres/src/lib.rs b/alkstore-postgres/src/lib.rs
index 4048b89..576e8f3 100644
--- a/alkstore-postgres/src/lib.rs
+++ b/alkstore-postgres/src/lib.rs
@@ -34,6 +34,11 @@
 //! module's bootstrap the DDL ground. The verification backlog's pg
 //! column (the ADR-022 contract suite rows this engine owns) runs in
 //! this crate's `contract_suite` test target.
+//!
+//! Every public item carries doc text; the missing-docs lint is part
+//! of the standing gates.
+
+#![warn(missing_docs)]
 
 mod forwarder;
 mod lock;
diff --git a/alkstore-postgres/src/opts.rs b/alkstore-postgres/src/opts.rs
index 194e4a3..9ddee54 100644
--- a/alkstore-postgres/src/opts.rs
+++ b/alkstore-postgres/src/opts.rs
@@ -35,7 +35,8 @@ pub(crate) const LISTENER_APPLICATION_NAME: &str = "alkstore-pg-listener";
 /// are `open`'s first argument (the tokio-postgres
 /// [`Config`](::tokio_postgres::Config)-parseable form, ADR-008 §6's
 /// `open(url, PgOpts)` pin); the engine never invents defaults for
-/// them. `open` fails with [`Error::Database`] if the config is
+/// them. `open` fails with
+/// [`Error::Database`](alkstore::Error::Database) if the config is
 /// unparseable or the server unreachable. TLS: the engine hardwires
 /// `NoTls` on every connection path regardless of the config's
 /// sslmode — v1 TLS is a post-v1 deployment concern
@@ -54,7 +55,8 @@ pub struct PgOpts {
     /// Default [`DEFAULT_MAX_SIZE`] = 8 (the deployment matrix's
     /// budget line; the listener adds +1 per LISTEN-ing process
     /// *outside* the pool — sizing rule `max_size + 1`). A value of
-    /// `0` fails [`open`](crate::open) with [`Error::Database`]
+    /// `0` fails [`open`](crate::open) with
+    /// [`Error::Database`](alkstore::Error::Database)
     /// immediately (validated at entry — no round trip; deadpool
     /// cannot grant checkouts from an empty pool).
     pub max_size: usize,
diff --git a/alkstore-postgres/src/tx.rs b/alkstore-postgres/src/tx.rs
index 343cd92..cce854e 100644
--- a/alkstore-postgres/src/tx.rs
+++ b/alkstore-postgres/src/tx.rs
@@ -1,6 +1,6 @@
 //! The transactional seam's pg arm (ADR-007) — `begin_tx`, the
-//! [`PgTxHandle`] (the pooled-object handle), and all eleven `*_tx`
-//! methods (`pg-engine-seam-tx`).
+//! [`PgTxHandle`] (the pooled-object handle), and all eleven
+//! transaction-handle methods (ten `*_tx` ops plus `commit`). (`pg-engine-seam-tx`).
 //!
 //! # No bridge, no `spawn_blocking`
 //!
diff --git a/alkstore-sqlite/src/lib.rs b/alkstore-sqlite/src/lib.rs
index 2d26cd4..4c40d83 100644
--- a/alkstore-sqlite/src/lib.rs
+++ b/alkstore-sqlite/src/lib.rs
@@ -5,8 +5,10 @@
 //! # Posture
 //!
 //! **Single-host** (ADR-016): this engine is file-backed, one machine,
-//! no runtime capability surface, no multi-host mode — NFS
-//! two-writers-unsupported is the inherited lineage honesty, stated
+//! no runtime capability surface, no multi-host mode — cross-process
+//! *on one host* is verified ground (`data_version` is cross-process
+//! by nature; deployment.md's matrix line), NFS two-writers
+//! unsupported is the inherited lineage honesty, stated
 //! here as the crate's deployment boundary (compile-time engine
 //! identity is the only engine-discovery mechanism — pick this crate,
 //! get this posture). Durability knobs, pool sizing, and the watcher
@@ -20,8 +22,14 @@
 //! points holds it; consumers budget transactions accordingly.
 //!
 //! Every engine call round-trips a blocking thread (the
-//! `spawn_blocking` seam — rusqlite connections are not
-//! `Send`-across-await; the family REQ-TTY-01 posture).
+//! `spawn_blocking` seam — the substrate is sync machinery, std
+//! threads and blocking iterators, bridged at the trait seam per the
+//! family REQ-TTY-01 posture).
+//!
+//! Every public item carries doc text; the missing-docs lint is part
+//! of the standing gates.
+
+#![warn(missing_docs)]
 
 mod lock;
 mod notify;
diff --git a/alkstore-sqlite/src/store.rs b/alkstore-sqlite/src/store.rs
index 277d08b..2a9e732 100644
--- a/alkstore-sqlite/src/store.rs
+++ b/alkstore-sqlite/src/store.rs
@@ -26,9 +26,12 @@
 //! [`SqliteStore::close`].
 //!
 //! Every engine call round-trips the `spawn_blocking` seam
-//! ([`crate::seam`]); rusqlite connections are not
-//! `Send`-across-await. Single-host by nature: file-backed, one
-//! machine; NFS two-writers-unsupported (the lineage's honesty
+//! ([`crate::seam`]) — the substrate is sync machinery (std threads,
+//! blocking iterators) bridged at the trait seam, per the family
+//! REQ-TTY-01 posture. Single-host by nature: file-backed, one
+//! machine; cross-process on one host is verified ground
+//! (`data_version` is cross-process by nature); NFS
+//! two-writers-unsupported (the lineage's honesty
 //! posture, inherited — ADR-016).
 
 use alkstore::Store;
diff --git a/alkstore-sqlite/src/substrate/queue_ops.rs b/alkstore-sqlite/src/substrate/queue_ops.rs
index 3768199..cc60281 100644
--- a/alkstore-sqlite/src/substrate/queue_ops.rs
+++ b/alkstore-sqlite/src/substrate/queue_ops.rs
@@ -487,6 +487,8 @@ fn now_unix(conn: &Connection) -> rusqlite::Result<i64> {
     conn.query_row("SELECT unixepoch()", [], |r| r.get(0))
 }
 
+/// The substrate's `@every` interval parser (`@every <n><unit>`,
+/// `<unit>` in `s|m|h|d`) — fuzz/test-only surface.
 pub fn parse_every_interval(spec: &str) -> Result<i64, String> {
     let body = spec
         .strip_prefix("@every ")
@@ -524,6 +526,8 @@ fn next_every_boundary(spec: &str, after: i64) -> Result<i64, String> {
         .ok_or_else(|| format!("next boundary overflows for {spec:?}"))
 }
 
+/// The substrate's schedule skip-forward arithmetic — fuzz/test-only
+/// surface.
 pub fn skip_forward(next_fire_at: i64, now: i64, interval: i64) -> i64 {
     let gap = now as i128 - next_fire_at as i128;
     let interval = interval.max(1) as i128;
diff --git a/alkstore-sqlite/src/tx.rs b/alkstore-sqlite/src/tx.rs
index da128dc..3d6d5a1 100644
--- a/alkstore-sqlite/src/tx.rs
+++ b/alkstore-sqlite/src/tx.rs
@@ -1,6 +1,6 @@
 //! The transactional seam's SQLite arm — `begin_tx`, the
 //! [`SqliteTxHandle`] (the writer-slot lease, ADR-007), and all eleven
-//! `*_tx` methods (`sqlite-engine-seam-tx`).
+//! transaction-handle methods (ten `*_tx` ops plus `commit`) (`sqlite-engine-seam-tx`).
 //!
 //! `begin_tx` acquires the writer slot and opens `BEGIN IMMEDIATE` on
 //! the acquired connection; the handle owns connection + slot. Every
diff --git a/alkstore/src/error.rs b/alkstore/src/error.rs
index 7f36017..e9cd2eb 100644
--- a/alkstore/src/error.rs
+++ b/alkstore/src/error.rs
@@ -1,3 +1,7 @@
+/// The crate's error taxonomy (ADR-008 §5): a small closed set of
+/// contract-meaningful variants plus the opaque [`Error::Database`]
+/// fallback. Nothing engine-specific ever rides the surface; driver
+/// detail lives in the source chain of the opaque variant.
 #[derive(Debug, thiserror::Error)]
 #[non_exhaustive]
 pub enum Error {
@@ -11,16 +15,25 @@ pub enum Error {
     /// outbox shape — the id in the notification, the payload in a
     /// table row.
     #[error("payload exceeds the engine's notification payload limit (limit: {limit} bytes)")]
-    PayloadTooLarge { limit: usize },
+    PayloadTooLarge {
+        /// The engine's byte limit that was exceeded.
+        limit: usize,
+    },
     /// A name carrying the reserved `__alkstore_` prefix was supplied
     /// to a shared-namespace entry point.
     #[error(
         "reserved name `{name}`: names carrying the reserved `__alkstore_` prefix are engine-owned"
     )]
-    ReservedName { name: String },
+    ReservedName {
+        /// The rejected name, as supplied.
+        name: String,
+    },
     /// A name failed entry-point validation.
     #[error("invalid name `{name}`")]
-    InvalidName { name: String },
+    InvalidName {
+        /// The rejected name, as supplied.
+        name: String,
+    },
     /// A schedule spec that doesn't parse under the v1 grammar
     /// (`@every <n><unit>` with `<n>` a positive integer and `<unit>`
     /// in `s|m|h|d`).
@@ -28,7 +41,10 @@ pub enum Error {
     /// Rejected by `schedule()` before storage, with no engine round
     /// trip; the caller fixes the spec string (ADR-009 §2, §6).
     #[error("invalid schedule spec `{spec}`")]
-    InvalidSpec { spec: String },
+    InvalidSpec {
+        /// The spec string that failed the grammar.
+        spec: String,
+    },
     /// The `run_schedules` runner's leadership lock was lost mid-run.
     ///
     /// A distinct, matchable outcome from the clean `Ok(())` a stop
diff --git a/alkstore/src/lib.rs b/alkstore/src/lib.rs
index fa2fb5f..093c689 100644
--- a/alkstore/src/lib.rs
+++ b/alkstore/src/lib.rs
@@ -4,6 +4,12 @@
 //! This crate is the contract artifact: no driver dependencies, ever.
 //! Engine crates (`alkstore-sqlite`, `alkstore-postgres`) depend on
 //! this crate and implement its traits.
+//!
+//! This crate's docs are part of the contract artifact (ADR-001 §1) —
+//! every public item carries doc text, and the missing-docs lint is
+//! part of the standing gates.
+
+#![warn(missing_docs)]
 
 mod error;
 mod event_receiver;
diff --git a/alkstore/src/lock.rs b/alkstore/src/lock.rs
index 8f454b1..1082053 100644
--- a/alkstore/src/lock.rs
+++ b/alkstore/src/lock.rs
@@ -13,7 +13,9 @@ pub trait Lock: Send {
     /// namespace — validated at the constructor).
     fn name(&self) -> &str;
 
-    /// Renew: a new **full** TTL window from now. `false` = lost it
+    /// Renew: a new **full** TTL window from now. `ttl` is a duration
+    /// argument (ADR-023 §2): `ttl <= 0` is a rejection (opaque `Err`,
+    /// never a silent immediately-expired lease). `false` = lost it
     /// (expired and re-acquired elsewhere — exclusivity lapses
     /// silently on expiry; no revocation event; ADR-008 §7). Holders
     /// of long work must renew within TTL.
diff --git a/alkstore/src/opts.rs b/alkstore/src/opts.rs
index fed23be..56975d6 100644
--- a/alkstore/src/opts.rs
+++ b/alkstore/src/opts.rs
@@ -51,9 +51,11 @@ pub struct EnqueueOpts {
 /// Opts changes apply to *future enqueues only*.
 ///
 /// The numeric fields are trusted as given, engine-side — no domain
-/// validation (ADR-023 §2's domain table covers the trait-surface
-/// arguments, not these consumer-constructed constants; a
-/// consumer-obligation note, not a defect). A non-positive
+/// validation: ADR-023 §2's domain table enumerates its covered
+/// arguments by call-site kind (extents, `try_lock`/`renew` TTLs,
+/// `trim_to`'s horizon, enqueue `delay`/`run_at`/`expires`) and does
+/// not cover these queue-stamp fields (a consumer-obligation note,
+/// not a defect). A non-positive
 /// `visibility_timeout_s` stamps claims instantly reclaimable, and
 /// `max_attempts <= 0` stamps rows that are never claimed — see
 /// deployment.md's consumer-obligation notes for the per-field
diff --git a/alkstore/src/queue.rs b/alkstore/src/queue.rs
index d83a0c1..74ae675 100644
--- a/alkstore/src/queue.rs
+++ b/alkstore/src/queue.rs
@@ -41,7 +41,9 @@ pub trait Queue: Send + Sync {
 
     /// Claim up to `n` rows, same ordering and exclusivity as
     /// [`Queue::claim_one`]. `worker_id` is consumer-local, non-empty
-    /// only (`InvalidName`).
+    /// only (`InvalidName`). `n` is an extent argument (ADR-023 §2):
+    /// `n <= 0` claims nothing — the empty `Vec`, a value (never an
+    /// error, never the whole queue).
     fn claim_batch<'a>(
         &'a self,
         worker_id: &str,
diff --git a/alkstore/src/store.rs b/alkstore/src/store.rs
index 8f9d915..8bfaf64 100644
--- a/alkstore/src/store.rs
+++ b/alkstore/src/store.rs
@@ -4,7 +4,25 @@
 //! Constructors and their option structs live in the engine crates
 //! (ADR-008 §6): the engine's `open` returns this trait, and a store
 //! handed out by an engine crate honors the full v1 surface. Consumer
-//! code never branches on engine type.
+//! code never branches on engine type. (The mem engine's engine-native
+//! constructor — `MemStore::new()`, no connection string — is the one
+//! documented exception to the open-prose, ADR-024 §4; the engine
+//! choice remains a dependency-graph fact made before any store
+//! exists.)
+//!
+//! # Numeric-argument domains (ADR-023 §2)
+//!
+//! Caller-supplied numeric arguments are classified by argument kind,
+//! uniform on every engine (validation at the trait-impl entry point):
+//! **extents** (`claim_batch`, the stream `read` forms, on the direct
+//! and tx paths alike) clamp to the empty value result on non-positive
+//! values — a value, not an error; **durations** (`try_lock`/
+//! `ttl`, `renew`/`ttl`) reject non-positive values (`Err`) — never a
+//! silent immediately-expired lease; **boundaries/offsets**
+//! (`trim_to`'s horizon; enqueue `delay`/`run_at`/`expires`) are
+//! total — any `i64` is well-defined. Queue/schedule opts-stamp fields
+//! are not in the domain table (trusted as given; deployment.md's
+//! consumer-obligation notes carry the per-field symptoms).
 
 use serde_json::Value;
 
@@ -70,7 +88,9 @@ pub trait Store: Send + Sync {
 
     /// Acquire a named TTL lock, or fail: `None` = someone holds it
     /// (no-work is a value, not an error). `owner` is consumer-local
-    /// (non-empty only); `ttl` is seconds. Exclusion lapses silently
+    /// (non-empty only); `ttl` is seconds — a duration argument
+    /// (ADR-023 §2): `ttl <= 0` is a rejection (opaque `Err`, never a
+    /// silent immediately-expired lease). Exclusion lapses silently
     /// at TTL expiry — holders renew within TTL (ADR-008 §7).
     fn try_lock<'a>(
         &'a self,
diff --git a/alkstore/src/stream_handle.rs b/alkstore/src/stream_handle.rs
index e13538f..00e4708 100644
--- a/alkstore/src/stream_handle.rs
+++ b/alkstore/src/stream_handle.rs
@@ -35,7 +35,9 @@ pub trait StreamHandle: Send + Sync {
     ) -> BoxedFuture<'a, Result<i64>>;
 
     /// Cursor read: events with `offset > ` cursor, `offset ASC`
-    /// (global FIFO — ADR-015 §4), up to `limit`. A read from a
+    /// (global FIFO — ADR-015 §4), up to `limit`. `limit` is an
+    /// extent argument (ADR-023 §2): `limit <= 0` reads nothing —
+    /// the empty `Vec`. A read from a
     /// trimmed-away region resumes at the trim horizon's first
     /// remaining row.
     fn read_since<'a>(
@@ -46,7 +48,9 @@ pub trait StreamHandle: Send + Sync {
 
     /// Cursor read from a consumer's stored checkpoint (absent
     /// consumer = 0). `consumer` is a consumer-local identifier
-    /// (non-empty only — `InvalidName`).
+    /// (non-empty only — `InvalidName`). `limit` is an extent
+    /// argument (ADR-023 §2): `limit <= 0` reads nothing — the
+    /// empty `Vec`.
     fn read_from_consumer<'a>(
         &'a self,
         consumer: &str,
@@ -66,9 +70,14 @@ pub trait StreamHandle: Send + Sync {
     fn get_offset<'a>(&'a self, consumer: &str) -> BoxedFuture<'a, Result<i64>>;
 
     /// Bounded growth, consumer-invoked: delete events with
-    /// `offset <= horizon` (exact boundary; ADR-015 §5). Surviving
+    /// `offset <= horizon` (exact boundary; ADR-015 §5). The horizon
+    /// is a boundary argument (ADR-023 §2) — total: a negative
+    /// horizon deletes nothing, idempotently. Surviving
     /// events keep their offsets (gaps legal, never renumbered); trim
-    /// emits no wake. Returns the deleted-row count.
+    /// emits no dedicated wake and no notify (on SQLite the
+    /// `data_version` watcher may still fire on the trim commit — any
+    /// committed write bumps it; a spurious hint, contract-legal).
+    /// Returns the deleted-row count.
     fn trim_to<'a>(&'a self, horizon: i64) -> BoxedFuture<'a, Result<i64>>;
 
     /// Durable consumption: attach a consumer that reads to the
diff --git a/alkstore/src/tx.rs b/alkstore/src/tx.rs
index 9bf198d..3add0a4 100644
--- a/alkstore/src/tx.rs
+++ b/alkstore/src/tx.rs
@@ -107,7 +107,8 @@ pub trait TxHandle: Send {
 
     /// Read stream events from `offset`, inside the caller's
     /// transaction (`offset ASC`, global FIFO — ADR-015 §4). Pure
-    /// read. Validates `stream`.
+    /// read. Validates `stream`. `limit` is an extent argument
+    /// (ADR-023 §2): `limit <= 0` reads nothing — the empty `Vec`.
     fn read_since_tx<'a>(
         &'a mut self,
         stream: &str,
@@ -117,7 +118,9 @@ pub trait TxHandle: Send {
 
     /// Read stream events from a consumer's stored checkpoint, inside
     /// the caller's transaction. Pure read. Validates `stream`;
-    /// `consumer` is consumer-local (non-empty only).
+    /// `consumer` is consumer-local (non-empty only). `limit` is an
+    /// extent argument (ADR-023 §2): `limit <= 0` reads nothing — the
+    /// empty `Vec`.
     fn read_from_consumer_tx<'a>(
         &'a mut self,
         stream: &str,
diff --git a/alkstore/src/validation.rs b/alkstore/src/validation.rs
index 971b8ed..e9abc1d 100644
--- a/alkstore/src/validation.rs
+++ b/alkstore/src/validation.rs
@@ -36,11 +36,13 @@ pub enum NameKind {
 ///
 /// - non-empty (after no trimming — whitespace-only counts as
 ///   non-empty content but is nonetheless rejected below) →
-///   [`Error::InvalidName`] when empty
+///   [`Error::InvalidName`](crate::Error::InvalidName) when empty
 /// - `NameKind::Shared` additionally rejects names carrying
-///   [`RESERVED_PREFIX`] with [`Error::ReservedName`]
+///   [`RESERVED_PREFIX`] with
+///   [`Error::ReservedName`](crate::Error::ReservedName)
 ///
-/// Whitespace-only names are rejected as [`Error::InvalidName`] for
+/// Whitespace-only names are rejected as
+/// [`Error::InvalidName`](crate::Error::InvalidName) for
 /// both kinds: they are never a meaningful name on any engine.
 pub fn validate_name(kind: NameKind, name: &str) -> crate::Result<()> {
     if name.is_empty() || name.trim().is_empty() {
diff --git a/docs/architecture/engine-mem.md b/docs/architecture/engine-mem.md
index b5852b0..b2731bc 100644
--- a/docs/architecture/engine-mem.md
+++ b/docs/architecture/engine-mem.md
@@ -58,7 +58,10 @@ daemons, the mem engine realizes with process-owned state:
 - **No background machinery to bootstrap** — no schema bootstrap, no
   watcher thread (nothing cross-connection to poll), no forwarder.
   The only async machinery is tokio-time-driven: lock TTLs, the
-  scheduler's boundary waits, and wake delivery.
+  scheduler's boundary waits, and wake delivery. All timestamps read
+  the process clock through one internal accessor — no server clock
+  to defer to, no per-mechanism clock reads (the wasm-posture note,
+  [ADR-024](decisions/024-mem-engine.md) §5).
 - **Wake substrate**: in-process channels. Wakes deliver at the
   commit boundary directly to each open receiver — no batching
   boundary exists, so coalescing is not applicable; per-subscriber
diff --git a/docs/architecture/engine-postgres.md b/docs/architecture/engine-postgres.md
index 7c2d815..4e1e81c 100644
--- a/docs/architecture/engine-postgres.md
+++ b/docs/architecture/engine-postgres.md
@@ -27,7 +27,8 @@ obligations live in the core spec.
   family as design reference
   ([ADR-005](decisions/005-dependency-ownership.md)); semantics depth
   pinned by [ADR-010](decisions/010-queue-semantics-depth.md) — all
-  engine-owned tables (job, dead, stream, offsets, schedule) in one
+  engine-owned tables (job, dead, stream, offsets, schedule, locks)
+  in one
   PostgreSQL schema (default `alkstore`), queues as rows, no
   per-queue tables.
 
@@ -66,7 +67,7 @@ obligations live in the core spec.
 | notify / listen | `pg_notify(...)` inside the caller's tx (delivers at commit — native commit-atomicity, [ADR-007](decisions/007-transactional-seam.md)); `listen()` via LISTEN on the forwarder's connection, fanout to receivers |
 | streams | durable event table + per-consumer offset cursors; `pg_notify` as the wake trigger ([ADR-006](decisions/006-wake-and-delivery-contract.md) mechanism split: durable row, LISTEN wake — the pg-boss-family shape). Depth per [ADR-015](decisions/015-streams-depth.md): the event table carries the nullable key column (carried metadata), reads yield `offset ASC` (global FIFO — bigserial offsets, immutable), `publish_with_key_tx` validates + inserts inside the caller's tx, `trim_to` is a `DELETE … WHERE offset <= ?` on a pool connection (wakes nothing) |
 | queues | re-derived queue table + `FOR UPDATE SKIP LOCKED` claim + LISTEN-driven wake with re-poll safety net (default consumption posture, measured 5–16× vs 50 ms poll; poll-only fallback); states/dead-letter/backoff/visibility per [ADR-010](decisions/010-queue-semantics-depth.md), all in the engine-owned schema; the curve/stamps arithmetic is computed engine-side per [ADR-012](decisions/012-forked-substrate-design.md) §2 (equivalence with the SQLite engine pinned by the contract suite) |
-| named locks | advisory-lock-semantics TTL locks (pg-boss-family design reference; guarantee row pinned by [ADR-008](decisions/008-contract-v1-pinning.md) §7) |
+| named locks | row-backed TTL locks (a `locks` table in the engine-owned schema — ADR-008 §7 pins row-backed machinery, not pg advisory locks; the pg-boss family is the design reference; guarantee row pinned by [ADR-008](decisions/008-contract-v1-pinning.md) §7) |
 | scheduler / outbox | collapse shape ([ADR-009](decisions/009-scheduler-collapse.md)): schedule rows in the engine-owned schema, tick re-derived (boundary advance + 64-boundary catch-up cap, honker parity), leadership via the engine's lock machinery on `__alkstore_scheduler`; outbox = helper over queues |
 | begin_tx | pool checkout + `BEGIN`, returning the caller-held handle ([ADR-007](decisions/007-transactional-seam.md)) |
 | handle ops | straight `.await`s through the held object; commit/rollback returns the object to the pool |
diff --git a/tasks/release-crate-docs.md b/tasks/release-crate-docs.md
index 61f4941..c614dd5 100644
--- a/tasks/release-crate-docs.md
+++ b/tasks/release-crate-docs.md
@@ -1,7 +1,7 @@
 ---
 id: release-crate-docs
 name: Crate docs final pass — rustdoc across the four published crates
-status: pending
+status: completed
 depends_on: []
 scope: moderate
 risk: low
@@ -50,17 +50,17 @@ polish.
 
 ## Acceptance Criteria
 
-- [ ] `cargo doc --no-deps` (workspace) zero warnings; the
+- [x] `cargo doc --no-deps` (workspace) zero warnings; the
       `-D warnings` doc gate posture recorded
-- [ ] Missing-docs audit recorded (public items × 4 crates); gaps
+- [x] Missing-docs audit recorded (public items × 4 crates); gaps
       filled; the `#![deny(missing_docs)]` decision made and recorded
-- [ ] Core doc text spot-checked against core-contract.md; engine
+- [x] Core doc text spot-checked against core-contract.md; engine
       lib-doc posture claims spot-checked against deployment.md —
       drifts fixed or recorded
-- [ ] The doc-hidden fuzz re-exports documented as fuzz/test-only at
+- [x] The doc-hidden fuzz re-exports documented as fuzz/test-only at
       all three engine roots
-- [ ] The example decision made (landed or recorded not-taken)
-- [ ] Workspace gates green (`cargo build`, `cargo test`, clippy
+- [x] The example decision made (landed or recorded not-taken)
+- [x] Workspace gates green (`cargo build`, `cargo test`, clippy
       `-D warnings`, fmt)
 
 ## References
@@ -77,8 +77,116 @@ polish.
 
 ## Notes
 
-> To be filled by implementation agent
+- **`#![deny(missing_docs)]` decision**: **`#![warn(missing_docs)]`**
+  adopted at the four published crate roots instead of deny — with
+  rationale: the standing merge gate (`cargo clippy --all-targets --
+  -D warnings`) promotes rustc lints to errors anyway, so the lint is
+  *enforced* while plain `cargo build`/`cargo test` remain unblocked
+  mid-task (a deny attribute fails every build the moment a pub item
+  lacks text, punishing incremental work). Recorded as the standing
+  posture in AGENTS.md's Verification Commands section alongside the
+  doc-gate line.
+- **Doc gate posture recorded**: `RUSTDOCFLAGS="-D warnings" cargo
+  doc --no-deps` — zero warnings, added to AGENTS.md's Verification
+  Commands block as the doc gate.
+- **Missing-docs audit results** (full-surface probe via
+  `RUSTFLAGS='-Wmissing_docs' RUSTDOCFLAGS='-Wmissing_docs' cargo doc
+  --no-deps`, probe reports 0 after fixes): every public item across
+  the four crates carries doc text. Gaps found and filled: the
+  `Error` enum's own doc + its four struct-variant fields
+  (`alkstore/src/error.rs`); the sqlite substrate's two fuzz-surface
+  functions (`substrate/queue_ops.rs` — their source-side docs had
+  never been written; the pg/mem scheduler twins already had them).
+- **Core doc fixes against core-contract.md** (drifts fixed): (1)
+  `StreamHandle::trim_to`'s flat "trim emits no wake" corrected to the
+  contract's exact row — no *dedicated wake and no notify*, with the
+  SQLite `data_version` spurious-hint nuance (a trim commit does wake
+  the watcher, contract-legal); (2) the ADR-023 §2 numeric-domain
+  rules were missing from every affected method's doc text — added the
+  extent rules (`claim_batch`/`read_since`/`read_from_consumer` and
+  their tx twins: `n/limit <= 0` → empty value), duration rules
+  (`try_lock`/`renew`: `ttl <= 0` rejects, opaque `Err`), the
+  boundary-totality rule for `trim_to`'s horizon, and the shared
+  domain-rule paragraph (store.rs module doc, per ADR-023 §2's own
+  amendment text); (3) the `QueueOpts` "trusted as given" gloss drew
+  the wrong criterion (opts-struct constants it names *are*
+  trait-surface arguments) — reworded to the domain table's real
+  boundary (enumeration by call-site kind); (4) store.rs's
+  constructor prose gained the ADR-024 §4 `MemStore::new()` exception
+  clause (amended into the contract 2026-10-10).
+- **Engine doc fixes**: (1) "all eleven `*_tx` methods" was an
+  off-by-one — the trait carries ten `*_tx` ops plus `commit`;
+  reworded in both `alkstore-sqlite/src/tx.rs` and
+  `alkstore-postgres/src/tx.rs` module docs; (2) the SQLite
+  `spawn_blocking` rationale misstated the driver property (rusqlite
+  `Connection` *is* `Send`; the honest reason is that the substrate is
+  sync machinery — std threads, blocking iterators) — reworded in
+  `alkstore-sqlite/src/lib.rs` + `store.rs` per engine-sqlite.md; (3)
+  the SQLite lib doc gained the missing third element of ADR-016 §3's
+  mandated single-host prose — one-host cross-process *supported*
+  (`data_version` is cross-process by nature), matching deployment.md;
+  (4) cosmetic: a malformed doc-comment indent line on `PgOpts::max_size`.
+- **Spec-side alignments** (code docs + ADR win, spec aligned to
+  match): `docs/architecture/engine-postgres.md` now lists `locks` in
+  the schema-family enumeration and rewords "advisory-lock-semantics
+  TTL locks" to the ADR-008 §7 row-backed realization;
+  `docs/architecture/engine-mem.md` gained the one-clock-accessor line
+  (no server clock to defer to) that the mem lib doc's wasm identity
+  and `clock.rs` already cited — the claim now has its spec home.
+- **Recorded, not fixed — two boundary-wording drifts for
+  `release-contract-window-close`** (the task that owns the class-1
+  window's last dispositions): (1) `EventReceiver::try_recv`'s error
+  arms (`Database` or `Closed`) are claimed in core doc text but not
+  yet pinned in contract text — that task's §2 already decides
+  `Err(Closed)` mirroring `WakeReceiver::try_recv` (mem-test-pinned),
+  so the doc text is a forward-claim of the decided disposition, left
+  as-is; (2) the notify payload boundary: ADR-004/core-contract say
+  "≤ 8000 bytes" loosely, but the engine (POC + test-pinned against a
+  live server) rejects a serialization of exactly 8000 bytes — the
+  server's NUL-inclusive budget — so acceptance is ≤ 7999; the pg
+  engine's docs state the truthful predicate; a normative-spec
+  wording amendment is the window task's call.
+- **Example decision: landed** — the honest-ephemeral engine is the
+  zero-config one, so `alkstore-mem`'s crate docs now carry the
+  contract round-trip example (a compile-checked doctest:
+  `MemStore::new()` → `queue` → `enqueue` → `claim_one` →
+  `job().id`/`JobState` asserts), with a pointer that the other
+  engines' round-trip is identical via their `open` form. The mem
+  lib's architecture paragraph dropped its `crate::state`/`crate::wakes`
+  intra-doc links (private modules — the private-intra-doc-link
+  warning class) in favor of plain code spans.
+- **Fuzz re-exports (AC 4)**: verified all six `#[doc(hidden)]`
+  re-exports at the three engine roots carry the four-part
+  fuzz/test-only disclosure, name the correct module of origin, and
+  match the re-exported function's semantics — no changes needed.
+
+- Status of record: 2026-10-11, gates green (`cargo build`, `cargo
+  test` incl. the new doctest, `cargo clippy --all-targets -- -D
+  warnings`, `cargo fmt --check`, `RUSTDOCFLAGS="-D warnings" cargo
+  doc --no-deps`, missing-docs probe 0).
 
 ## Summary
 
-> To be filled on completion
\ No newline at end of file
+The release doc pass over the four published crates: `RUSTDOCFLAGS="-D
+warnings" cargo doc --no-deps` is now the standing doc gate (recorded
+in AGENTS.md) and the workspace builds docs with zero warnings (8
+baseline rustdoc-warning classes fixed: broken `Error::*` links,
+redundant explicit links, bracket-escape escapes, and a
+private-intra-doc link). The `#![warn(missing_docs)]` enforcement
+posture landed on all four crate roots (clippy gate enforces);
+audit-probe reports zero undocumented public items after filling the
+`Error` enum/field docs and the sqlite substrate's fuzz-surface fn
+docs. Accuracy spot-checks ran core docs against core-contract.md and
+engine lib-doc posture claims against deployment.md/ADR-016/ADR-024:
+eight drifts fixed (trim_to wake nuance, the full ADR-023 §2
+numeric-domain doc text + shared paragraph, the QueueOpts gloss, the
+`MemStore::new()` constructor exception, the eleven-vs-ten tx-method
+count, the SQLite `Send`-misstatement rationale, the missing
+one-host-cross-process honesty element, a cosmetic indent), two
+spec-side alignments made (pg locks table family + row-backed
+wording; mem clock-accessor spec home), and two boundary-wording
+dispositions recorded for `release-contract-window-close`
+(`try_recv` arm pinning; the 8000-byte boundary's "≤" reading). The
+example decision landed: alkstore-mem's crate docs carry the
+zero-config queue round-trip doctest (green in the workspace test
+run). All workspace gates re-verified green.
\ No newline at end of file